Perhaps you should try some spelling variations:
ve cham » va cham, ve chat, vu cham
vat cua » mat cua, bat cua, dat cua
dan vat » dang vat, van vat, dan va
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky nang)) xay hoi. hieu ve cham ((xuc va) OR (tuc va)) dan vat cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky dang) OR (ky nang)) xay hoi. hieu ve cham ((xuc va) or (tuc va)) dan vat cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) OR (ky nang)) xay hoi. hieu ve cham ((xuc va) or (tuc va)) dan vat cua tre*.